diff --git a/bin/run_docker_test b/bin/run_docker_test
index 33b51fba..a2143620 100755
--- a/bin/run_docker_test
+++ b/bin/run_docker_test
@@ -80,7 +80,7 @@ def main():
     inspect = [
         'docker', 'inspect',
         '-f', "{{.State.ExitCode}}",
-        "{}_{}_1".format(
+        "{}_{}-1".format(
             isolation_id,
             test_service)
     ]